Datasheet > BuckCont> RT8206A

RT8206A

更新时间： 2024-11-12 07:07:59

品牌	Logo	应用领域
立锜 - RICHTEK		电脑控制器
页数	文件大小	规格书
26页	360K
描述
High-Efficiency, Main Power Supply Controllers for Notebook Computers

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中文翻译

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RT8206A 数据手册

RT8206A/B

High-Efficiency, Main Power Supply Controllers

for Notebook Computers

General Description

Features

^zWide Input Voltage Range 6V to 25V

^zDual Fixed 5V/3.3V Outputs or Adjustable from 2V

to 5.5V, 1.5% Accuracy

The RT8206A/B dual step-down, switch-mode power-

supply (SMPS) controller generates logic-supply voltages

in battery-powered systems. The RT8206A/B includes two

pulse-width modulation (PWM) controllers fixed at 5V/

3.3V or adjustable from 2V to 5.5V. An optional external

charge pump can be monitored through SECFB

(RT8206A). This device also features a linear regulator

providing a fixed 5V output. The linear regulator provides

up to 70mA output current with automatic linear-regulator

bootstrapping to the BYP input. The RT8206A/B includes

on-board power-up sequencing, the power-good outputs,

internal soft-start, and internal soft-discharge output that

prevents negative voltages on shutdown.

^zSecondary Feedback Input Maintains Charge Pump

Voltage (RT8206A)

^zIndependent Enable and Power Good

^z5V Fixed LDO Output : 70mA

^z2V Reference Voltage 1% : 50uA

^zConstant ON-Time Control with 100ns Load Step

Response

^zFrequency Selectable via TON Setting

z R_DS(ON)Current Sensing and Programmable Current

Limit

z Selectable PWM, DEM or Ultrasonic Mode

z Internal Soft-Start with 5 Steps Current Limiting and

Soft-Discharge

Aconstant on-time PWM control scheme operates without

sense resistors and provides 100ns response to load

transients while maintaining a relatively constant switching

frequency. The unique ultrasonic mode maintains the

switching frequency above 25kHz, which eliminates noise

in audio applications. Other features include diode-

emulation mode (DEM), which maximizes efficiency in

light-load applications, and fixed-frequency PWM mode,

which reduces RF interference in sensitive application.

z High Efficiency Up to 97%

z 5mW Quiescent Power Dissipation

z Thermal Shutdown

z RoHS Compliant and Halogen Free

Ordering Information

RT8206

The RT8206A/B is available in the WQFN-32L 5x5

package.

Package Type

QW : WQFN-32L 5x5 (W-Type)

Operating Temperature Range

G : Green (Halogen Free with Commer-

cial Standard)

Applications

z Notebook and Sub-Notebook Computers

A : With SECFB

B : Without SECFB

z 3-Cell and 4-Cell Li+ Battery-PoweredDevices

Note :

Richtek Green products are :

` RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

` Suitable for use in SnPb or Pb-free soldering processes.

DS8206A/B-03 December 2009

www.richtek.com

12 3 4 5 6 7...26

中文翻译

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与RT8206A相关器件

型号	品牌	获取价格	描述	数据表
RT8206AGQW	RICHTEK	获取价格	High Efficiency, Main Power Supply Controllers for Notebook Computers
RT8206B	RICHTEK	获取价格	High-Efficiency, Main Power Supply Controllers for Notebook Computers
RT8206BGQW	RICHTEK	获取价格	High Efficiency, Main Power Supply Controllers for Notebook Computers
RT8206L	RICHTEK	获取价格	High Efficiency, Main Power Supply Controller for Notebook Computers
RT8206M	RICHTEK	获取价格	High Efficiency, Main Power Supply Controller for Notebook Computers
RT8207	RICHTEK	获取价格	Complete DDRII/DDRIII Memory Power Supply Controller
RT8207GQW	RICHTEK	获取价格	Complete DDRII/DDRIII Memory Power Supply Controller
RT8207K	RICHTEK	获取价格	暂无描述
RT8207L	RICHTEK	获取价格	暂无描述
RT8207LGQW	RICHTEK	获取价格	Complete DDRII/DDRIII/Low-Power DDRIII/DDRIV Memory Power Supply Controller

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